/**
 * IInterpolator.java
 * colourmap
 * Copyright (C) 2010 Alan W.F. Boyd
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * 
 * You can contact the author via the google code web page for the project
 * <http://colourmap.googlecode.com>
 */
package com.googlecode.colourmap.interpolator;

import java.util.HashMap;

import com.googlecode.colourmap.Point;

/**
 * The interpolator calculates the colour to use at a point on the graph, given a coordinate
 * 
 * @author Alan W.F. Boyd
 */
public interface IInterpolator
{	
	/**
	 * Provides the set of points in the data file.
	 * These points are used to determine the values of other (non-provided) points
	 * @param p the data file points
	 */
	public void setPoints(HashMap<Point, Float> p);
	
	/**
	 * Provides a Float object indicating the value of a point
	 * @param c the point whose value is to be determined
	 * @return the value of that point
	 */
	public Float getValue(Point c);
}
